[Regexp] Re: GNU regexp for Java potential bug

[Wes Biggs]

Hi Marc, it does look like a possible bug.  I'm copying to the user's 
list (maybe someone else has seen it) and I'll look into it.

The package is still maintained, though the "actively" bit is arguable. :-)

Wes

Marc Fraioli wrote:

> Hi Wes,
>
> I'm not sure if your java regexp package is still actively maintained, 
> but I thought it couldn't hurt to ask.  I'm seeing a problem with an 
> expression that matches multiple lines, where the package loses the 
> first character of the first match (if there are multiple matches, 
> matches other than the first are fine, but the first one loses the 
> initial character).  I'm creating the RE object with two options-- 
> RE.REG_DOT_NEWLINE and RE.REG_MULTILINE.  The expression is:
>
> ([0-9]*.[0-9]*.[0-9]*) *([0-9]*:[0-9]*:.*?)$.*?^AMQ([0-9]*): *(.*?)^$
>
> and some sample of the input I'm searching is:
>
> 09/10/03  09:47:35
> AMQ9411: Repository manager ended normally.
>
> EXPLANATION:
> The repository manager ended normally.
> ACTION:
> None.
> ------------------------------------------------------------------------------- 
>
>
>
> I slightly modified the RETest.java that comes with the package to use 
> RE.REG_DOT_NEWLINE and RE.REG_MULTILINE as I am doing, and used it to 
> test this, and I get output like this:
>
> gnu.regexp version 1.1.4-dev
>         Input Text: 09/10/03  09:47:35
> AMQ9411: Repository manager ended normally.
>
> EXPLANATION:
> The repository manager ended normally.
> ACTION:
> None.
> ------------------------------------------------------------------------------- 
>
>
> Regular Expression: ([0-9]*.[0-9]*.[0-9]*) 
> *([0-9]*:[0-9]*:.*?)$.*?^AMQ([0-9]*): *(.*?)^$
>      Compiled Form: (?:((?:(?:0-9))*.(?:(?:0-9))*.(?:(?:0-9))*)(?: 
> )*((?:(?:0-9))*:(?:(?:0-9))*:(?:.)*?)$(?:.)*?^AMQ((?:(?:0-9))*):(?: 
> )*((?:.)*?)^$)
>     Minimum Length: 8
>  isMatch() returns: false
>    getAllMatches(): 1 matches
> Match 0 (1,211): 9/10/03  09:47:35
> AMQ9411: Repository manager ended normally.
>
> EXPLANATION:
> The repository manager ended normally.
> ACTION:
> None.
> ------------------------------------------------------------------------------- 
>
>
> Match found from position 1 to position 211
> Match was: '9/10/03  09:47:35
> AMQ9411: Repository manager ended normally.
>
> EXPLANATION:
> The repository manager ended normally.
> ACTION:
> None.
> ------------------------------------------------------------------------------- 
>
> '
> Subexpression #1: from position 1 to position 8
> The subexpression matched this text: '9/10/03'
> Subexpression #2: from position 10 to position 18
> The subexpression matched this text: '09:47:35'
> Subexpression #3: from position 22 to position 26
> The subexpression matched this text: '9411'
> Subexpression #4: from position 28 to position 211
> The subexpression matched this text: 'Repository manager ended normally.
>
> EXPLANATION:
> The repository manager ended normally.
> ACTION:
> None.
> ------------------------------------------------------------------------------- 
>
> '
> substitute(): 0<!--9/10/03  09:47:35
> AMQ9411: Repository manager ended normally.
>
> EXPLANATION:
> The repository manager ended normally.
> ACTION:
> None.
> ------------------------------------------------------------------------------- 
>
> -->
> substituteAll(): 0<!--9/10/03  09:47:35
> AMQ9411: Repository manager ended normally.
>
> EXPLANATION:
> The repository manager ended normally.
> ACTION:
> None.
> ------------------------------------------------------------------------------- 
>
> -->
>
> You may notice that the date in the input text starts with '09', but 
> what the library returns is just '9' (see subexpression #1).  Have you 
> by any chance run across this before?
>
>         Thanks for any info,
>
>         Marc